How To Use A Resistor For 12 Volt To 5 Volt
Electrical energy follows several physical laws. One of these laws, Kirchhoff's Voltage Law, explains that the sum of the voltage drops around a closed circuit loop must equal zero. In a circuit with multiple electrical resistors, the voltage will drop at each resistor electrical joint. This can be useful if you need to obtain five volts from a 12-volt power source.
Step 1
Cut two pieces of electrical wire. Strip ½ an inch of insulation from the ends of each wire. Verify that the power supply is turned off.
Step 2
Twist together one end of the first wire with one of the leads from the 1.4-kiloohm resistor. Connect the loose end of this wire to the positive terminal on the power supply.
Step 3
Twist together the free lead from the 1.4-kiloohm resistor with one of the leads from the 1-kiloohm resistor.
Step 4
Twist together the free lead from the 1-kiloohm resistor with one end of the second wire. Connect the loose end of this wire to the negative terminal on the power supply. Turn the power supply on
Step 5
Turn on the voltmeter and set the scale to measure "Volts DC." Place the black voltmeter probe on the electrical joint between the second wire and the 1-kiloohm resistor. Place the red voltmeter probe on the electrical joint between the two resistors. The voltage across the resistor will be approximately 5 volts.
Things Needed
- 12-volt DC power supply
- 1.4-kiloohm resistor
- 1-kiloohm resistor
- Electrical wire
- Electrical pliers
- Voltmeter
TL;DR (Too Long; Didn't Read)
Electrical resistors can vary in quality. The resistance value of a metal-film resistor is accurate to within 1%. Carbon-film resistors are accurate to within 5% tolerance, while the resistance of a wirewound resistor can vary as much as 10%.
References
Cite This Article
MLA
Sandoval, David. "How To Use A Resistor For 12 Volt To 5 Volt" sciencing.com, https://www.sciencing.com/use-12-volt-5-volt-8155261/. 24 April 2017.
APA
Sandoval, David. (2017, April 24). How To Use A Resistor For 12 Volt To 5 Volt. sciencing.com. Retrieved from https://www.sciencing.com/use-12-volt-5-volt-8155261/
Chicago
Sandoval, David. How To Use A Resistor For 12 Volt To 5 Volt last modified August 30, 2022. https://www.sciencing.com/use-12-volt-5-volt-8155261/